Research on Intelligent Control Model of V2G Bidirectional Charger Considering Electricity Price Constraint

Under the control of V2G frequency modulation signal, the output power range of the charger will be widened, the current ripple ratio will increase and the current response speed will slow down under light load, resulting in zero crossing distortion, and the steady-state error of the traditional controller will also increase. Therefore, the intelligent control model of V2G bi-directional charger considering price constraints is proposed. This paper studies the control coordination between AC-DC converter and DC-DC converter in traditional charging mode and V2G mode, and the scheme of controlling charger to feedback active power and reactive power to power grid. Finally, by improving the structure of LCL filter, the resonant frequency oscillation peak is suppressed, and the drive circuit with buffer is designed to solve some EMC problems encountered in the process of experiment, such as the interference of charger switch drive circuit and dead time oscillation.